ConnectAd: Bidder params update

[rtuschkany]

Accept multiple networkid and siteid types to fix https://github.com/prebid/Prebid.js/issues/6361

[github-actions[bot]]

Code coverage summary

Note:

• Prebid team doesn't anticipate tests covering code paths that might result in marshal and unmarshal errors

• Coverage summary encompasses all commits leading up to the latest one, b9ff00e1a057575f7252ddbb445e5c357a19aa3c

  connectad

  Refer here for heat map coverage report

  github.com/prebid/prebid-server/v2/adapters/connectad/connectad.go:22:  Builder         100.0%
  github.com/prebid/prebid-server/v2/adapters/connectad/connectad.go:29:  MakeRequests        95.0%
  github.com/prebid/prebid-server/v2/adapters/connectad/connectad.go:73:  MakeBids        100.0%
  github.com/prebid/prebid-server/v2/adapters/connectad/connectad.go:107: preprocess      100.0%
  github.com/prebid/prebid-server/v2/adapters/connectad/connectad.go:141: addImpInfo      100.0%
  github.com/prebid/prebid-server/v2/adapters/connectad/connectad.go:151: addHeaderIfNonEmpty 100.0%
  github.com/prebid/prebid-server/v2/adapters/connectad/connectad.go:157: unpackImpExt        88.9%
  github.com/prebid/prebid-server/v2/adapters/connectad/connectad.go:181: buildImpBanner      100.0%
  total:                                  (statements)        97.6%